Gaussian blur #1744

Job	Run time
Fuzz targets (afl)	2m 26s
build_benchmarks	46s
Fuzz targets (cargo-fuzz)	53s
cargo-deny	20s
cargo-semver-checks	22s
clippy	2m 2s
public_private_dependencies	23s
rustfmt	3s
test_avif_decoding	1m 17s
test_other_archs (powerpc-unknown-linux-gnu)	2m 12s
test_features	22s
test_other_archs (i686-unknown-linux-gnu)	1m 21s
test_toolchains (1.70.0)	33s
test_features (default)	1m 41s
test_toolchains (nightly)	1m 10s
test_features (rayon)	23s
test_toolchains (beta)	1m 23s
test_features (avif)	53s
test_features (bmp)	24s
test_features (dds)	18s
test_features (exr)	39s
test_features (ff)	36s
test_features (gif)	21s
test_features (hdr)	32s
test_features (ico)	31s
test_features (jpeg)	29s
test_features (png)	29s
test_features (pnm)	22s
test_features (qoi)	19s
test_features (tga)	22s
test_features (tiff)	30s
test_features (webp)	21s
	24m 43s

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